Lon Chaney
— Professor Edward C. Burke
Marceline Day
— Lucille Balfour
Henry B. Walthall
— Sir James Hamlin
Percy Williams
— Williams, Balfour's Butler
Conrad Nagel
— Arthur Hibbs
Polly Moran
— Miss Smithson, the New Maid
Edna Tichenor
— Luna, Bat Girl
Claude King
— Roger Balfour
Andy MacLennan
— Bat Girl's Assistant
Allan Cavan
— Real Estate Broker (uncredited)
Jules Cowles
— Gallagher (uncredited)